Example : The high priest's divinatory pronouncement.
Mantic powers.
A kind of sibylline book with ready and infallible answers to questions.

Synonyms : mantic, sibyllic, sibylline, vatic, vatical

Example : Theories about the extinction of dinosaurs are still highly conjectural.
The supposed reason for his absence.
Suppositious reconstructions of dead languages.
Hypothetical situation.

Synonyms : conjectural, hypothetic, hypothetical, supposed, suppositional, suppositious, supposititious